20848357 has 2 divisors, whose sum is σ = 20848358. Its totient is φ = 20848356.

The previous prime is 20848343. The next prime is 20848367. The reversal of 20848357 is 75384802.

It is a Cunningham number, because it is equal to 4566²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20848356 + 1 = 4566^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 20848357 - 2²³ = 12459749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20848367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10424178 + 10424179.

It is an arithmetic number, because the mean of its divisors is an integer number (10424179).

Almost surely, 2^20848357 is an apocalyptic number.

It is an amenable number.

20848357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20848357 is an equidigital number, since it uses as much as digits as its factorization.

20848357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 20848357 is about 4566.0001095050. Note that the first 3 decimals coincide. The cubic root of 20848357 is about 275.2267309207.

The spelling of 20848357 in words is "twenty million, eight hundred forty-eight thousand, three hundred fifty-seven".